diff --git a/libraries/AP_Notify/Buzzer.cpp b/libraries/AP_Notify/Buzzer.cpp
index 9c45467645..89f35fb896 100644
--- a/libraries/AP_Notify/Buzzer.cpp
+++ b/libraries/AP_Notify/Buzzer.cpp
@@ -34,7 +34,7 @@ bool Buzzer::init()
     hal.gpio->pinMode(BUZZER_PIN, HAL_GPIO_OUTPUT);
     on(false);
 
-    // set initial boot states. This prevents us issueing a arming
+    // set initial boot states. This prevents us issuing a arming
     // warning in plane and rover on every boot
     _flags.armed = AP_Notify::flags.armed;
     _flags.failsafe_battery = AP_Notify::flags.failsafe_battery;
diff --git a/libraries/AP_Notify/ToneAlarm_Linux.cpp b/libraries/AP_Notify/ToneAlarm_Linux.cpp
index 394bd77135..3a40648f6a 100644
--- a/libraries/AP_Notify/ToneAlarm_Linux.cpp
+++ b/libraries/AP_Notify/ToneAlarm_Linux.cpp
@@ -43,7 +43,7 @@ bool ToneAlarm_Linux::init()
         return false;
     }
 
-    // set initial boot states. This prevents us issueing a arming
+    // set initial boot states. This prevents us issuing a arming
     // warning in plane and rover on every boot
     flags.armed = AP_Notify::flags.armed;
     flags.failsafe_battery = AP_Notify::flags.failsafe_battery;